Cress Photo
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pf330    
     
     
Features
Long flash duration
Medium Intensity
Convenient and simple to use
Well suited to portable equipment
Fits standard light sockets
Operates in high shock and vibration environments
Typical Applications
High Speed motion picture photography
Destructive testing
Large format photography
Theatrical special effects
Specifications
Class FLood flash
Duration 1.75 seconds
Lag Time 180 msec
Peaking time -
Rated lumen seconds 140,000
Approx colour temp 3800°
Min BC power 10 MWS
Bulb type A-23
Base type Med screw #102
Voltage 4.5-45 volts
Amp 3
Replaces Sylvania Bulb Type FF 33
 

  • Includes bulb diameter tolerance and eccentricity of bulb to base
  • Warning printed on packaging should be read carefully prior to use
  • Avoid Static
  • Numerical data is typical
Flash Characteristics

Guide for flood flash lamps for high-speed motion pictures
Camera Speed
(frames per sec)
Frames
Exposure
Guide Number for lamp-to-subject
Distance (inches) film exposure index
Time* (sec)
    ASA 25-15 50-100 150-200 250-300
    DIN 15-18 18-21 23-24 25-26

200 1/1000   82.1 116.0 177.3 222.3
300 1/1500   71.3 100.8 154.1 193.0
400 1/2000   58.1 82.3 125.7 157.4
600 1/3000   47.2 66.6 101.7 127.5
800 1/4000   41.1 58.1 88.8 111.1
1000 1/5000   36.7 51.9 79.2 99.3
1500 1/7500   32.0 45.0 68.8 86.2
2000 1/10000   25.9 36.7 55.9 70.0
3000 1/15000   21.2 30.0 45.8 57.5
4000 1/20000   18.3 25.9 39.6 49.6
5000 1/25000   16.5 23.5 35.8 44.7
6000 1/30000   15.0 21.2 32.4 40.7
7000 1/35000   13.9 19.7 30.0 37.8
8000 1/40000   13.2 18.6 28.4 35.6

 * Based on one fifth x the reciprocal of frames per second. A smaller aperture opening of one-half f-stop should be used with cameras, calculating the exposure time as one third x the reciprocal of frames per second. To find the f-stop, divide the guide number by the lamp-to-sumbect distance in inches. (For metric use multiply the guide number by 2.54 and divide by the lamp-to-subject distance in cm.)

for further information contact:
Meggaflash Technologies Tel +353 65 22677
Clonroad Business Park, Fax +353 65 22688
Clonroad, Ennis, County Clare, email meggafla@iol.ie
Republic of Ireland http://www.meggaflash.com

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Bill Cress
PO Box 4262
Wayne, NJ 07474-4262
tel. (973) 694-1280
fax. (973) 694-6965

For more information or to order, e-mail wcress@ix.netcom.com

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